GB819856A - Improvements relating to the production of cyanocarboxylic acid amides - Google Patents
Improvements relating to the production of cyanocarboxylic acid amidesInfo
- Publication number
- GB819856A GB819856A GB4103/58A GB410358A GB819856A GB 819856 A GB819856 A GB 819856A GB 4103/58 A GB4103/58 A GB 4103/58A GB 410358 A GB410358 A GB 410358A GB 819856 A GB819856 A GB 819856A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dinitrile
- cyano
- acid amides
- exchanger
- aqueous pyridine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Cyano-carboxylic acid amides are prepared by unilaterally hydrolysing a dinitrile of the general formula NC-(CX2)n-R-(CX2)m-CN, where R is an aromatic ring or a heterocyclic ring of aromatic character, where X is H, CH3 or C2H5 when the two substituents are not in ortho positions and where m and n are whole numbers including O by means of anion exchangers in the presence of a liquid containing water and a volatile base. The anion exchanger is preferably slightly cross-linked polystyrene of 1 to 7 per cent cross-linking which contains quaternary ammonium groups and the liquid is preferably aqueous pyridine or ammonia. The reaction may be carried out between 40 DEG and 100 DEG C. using about twice as much exchanger as dinitrile and the mixture, containing dissolved, suspended or emulsified dinitrile, stirred for several hours at the desired temperature. In the examples, cyano carboxamides together with some dicarboxamide and unchanged dinitrile are obtained when terephthalonitrile, isophthalonitrile, 2,6-dicyanopyridine and p-phenylene diacetic acid dinitrile are hydrolysed in the presence of aqueous pyridine. Specification 782,258 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH819856X | 1957-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB819856A true GB819856A (en) | 1959-09-09 |
Family
ID=4539306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4103/58A Expired GB819856A (en) | 1957-03-08 | 1958-02-07 | Improvements relating to the production of cyanocarboxylic acid amides |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB819856A (en) |
-
1958
- 1958-02-07 GB GB4103/58A patent/GB819856A/en not_active Expired
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